Yes for the CPU, it does support VT
I have checked in the TPS and BIOS Release Notes, there is nothing mentionned on the Intel VT.
The best thing to do is to test it right in the shop where you are buying it. Just to be 100% sure about it.
I am 100% sure that the two boards DQ45CB and DQ45EK supports Intel VT due to the fact that they are AMT and a VPRO capable machine. Actually, all AMT boards like the Q Series board like dq35j0, dq965gf etc supports VT.
For DG41MJ, i am not sure if it does support it.
Unfortunately, i wont be able to give you an exact answer for this.
To be honest, i wont go for a non-AMT board, if i really need VT.
There was a board which was not AMT, with the latest bios update, the VT was removed from the BIOS. So it can be a problem in the future.
I guess that you have a 30 days return policy when buying them online. :-)
All the best,